Summary
As you have seen, Storyline offers a great deal of flexibility when creating knowledge checks for your learners. You can deviate from the traditional approach and create highly interactive and frequent checks throughout your material.
Storyline includes a wide variety of pre-built question formats that you can customize easily using all the standard slide editing techniques you already know how to use. You can also create branching scenarios just by redirecting which slide Storyline should go to if the learner answers the question right or wrong.
Outside of the pre-built questions, you've seen that almost any slide can be converted into a quiz with buttons, checkboxes, radio buttons, hotspots, and data entry. And almost any object can be transformed into something that can be dragged-and-dropped onto something else. This is very powerful not only for creating quizzes, but also for non-scored interactions that are engaging and fun for the learner.
You can even take it further without...